These tongs have just been approved by the FDA. My first question was "what the hell are they for?" After reading the answer my second question was "WHAT THE HELL ARE THEY FOR?" Then I watched the video:

According to the product page, Viberect "mimics rapid and repetitive manual/vaginal stimulation of the penis" to give you an erection and even achieve ejaculation, even if you have erectile dysfunction or spinal cord injuries. In other words, a high tech medical vibrator for men. This is how it works:

Simultaneous vibratory stimulation of both surfaces of the penis at high frequency (70-110Hz) for about 7-10 minutes can lead to reflexogenic activation of sexual pathways that initiate gradual filling of the penis with arterial blood by activating the Nitric oxide synthase mediated pudendo-cavernosal reflex. Other physiological effects include progressive rhythmic contraction of the ischicavernosus and bulbospongiosus muscles via the bulbocavernosus reflex, which help in strengthening the rigidity of erection.